Greenmangaming vs Steam version differences?

Hi there,

Are there any differences between the versions available on Steam and Greenmangaming? I ask because FM13 costs $80 US on Steam (I'm in New Zealand) but only $40 US at Greenmangaming. Does the Steam version come with extras that the Greenmangaming version doesn't or are us Kiwis simply a victim of Steam's regional pricing differences? The price difference just seems a bit ridiculous because I definitely don't remember FM12 being this expensive on Steam when it came out last year!

Like Jake says, you buy a product key and activate it via Steam. I bought mine from Gameholds and got it for about half the price of that in Steam Store. You can use this site to find the cheapest: Compare cd key prices search allkeyshop